A further step to the LDA-Sensor: Concept for the Miniature Signal Processing Unit

Ahsfrucr A concepi: for an integrable miniature signal processing unit for laser Doppler signals is presented. Its aim is to complete the existing miniature laser Doppler anemometer (as sensor head) to an LDA sensor. The colncept works in a totally new manner by using the cross-correlation for signal detection and validation. The resulting real-time histogram allows new statements about the measured process. Therefore, the concept is very suitable for universal sensor applications and gives the basis for an autonomous function. In an ASIC design signals up to 100 MHz with a time resolution of' 0.25 ns are processed in real time. The whole processing unit could be placed in a housing with 5 cm edge length and would have a power consumption of about 5 W.